I don't have much experience with Design Studio and in need of help. I'm trying to add a field to display the grand total of a purchase order. On the available data src, there is no field for grand total, so I will have to add one using calculation of existing field values. I want the total to display, of course, after a successful inquiry.
I would like to use the "Inquire" button to trigger the calculation - how do I go about doing it?